(70 ILCS 2805/49)(from Ch. 42, par. 447.13)Sec. 49. Petition and jurisdiction of courts. Upon the passage of any ordinance for a local improvement
the district, by and through an attorney employed for that
purpose, shall file a petition in the circuit court in the
county where the affected territory lies, or if the district
is situated in more than one county and the proposed
improvement lies in more than one county, then in the
circuit court in the county in which the major part of the
territory to be affected thereby is situated, in the name of
the district, requesting that steps be taken to levy a
special assessment for the improvement in accordance with
the provision of that ordinance. There shall be attached to
or filed with this petition a copy of the ordinance,
certified by the clerk under the corporate seal, and also a
copy of the recommendation of the committee of local improvements and of the
estimate of cost as approved by the board. The failure to
file any of these copies shall not affect the jurisdiction
of the court to proceed in the cause and to act upon the
petition, but if it appears in any such cause that the
copies have not been attached to or filed with the petition
before the filing of the assessment roll therein, then, upon
motion of any objector for that purpose on or before
appearance day in the cause, such copies shall be so filed.
The several circuit courts of this State have jurisdiction
of any proceeding under this Act.(Source: P.A. 85-1137.)